easy weld


An EDPM waterproof membrane with a TPE (Thermoplastic Elastomer) welding strip along the edges. easy weld is suitable for forming ballasted, adhered or mechanically fixed, single ply roofs.

Joints are formed by hot-air welding using the TPE strip and the whole roof can be formed without the use of naked flame.


  • High tensile strength and elongation at break.
  • 100% ozone and UV – radiation resistance.
  • Permanent elasticity.
  • Resistant to many chemicals (list available on request).
  • Resistant to root penetration (FLL approved in accordance with DIN 4102 T7).
  • Self extinguishing (NEN 6383).
  • Bitumen resistant.
  • Excellent temperature stability from -40 to + 120ºC.


Properly installed, the system has a life of at least 35 years.

Design guidance:

– Substrates:

easy weld is suitable for use on concrete and timber-based substrates, as well as insulation boards laid over profiled metal sheet and existing bituminous roof coverings.

– Vapour control layers:

Depending on internal conditions a vapour control layer may be required: consult Hertalan (UK) for details.

– Separation/ Protection layers:

Where easy weld is mechanically fixed a separating layer of Hertalan easy tex may be required to prevent the membrane 'drumming' on the substrate or damaging EPS insulation board.

In inverted roof systems the membrane should be protected from the ballast by a layer of easy tex.

Where easy weld is to be installed over an existing bituminous waterproof covering with embedded chips consider using two layers of easy tex, or a thin mineral wool or EPS insulation board.

General information

Uniclass 2015

Pr_25_57_51_66 Polymeric membranesPrimary


J42/10 Warm deck roof covering

J42/110 Warm deck roof covering

J42/120 Inverted roof covering

J42/130 Cold deck roof covering

Specification data - Polymeric membranes

Product Reference

easy weld Basic

easy weld MF




easy weld MF only.


1.3 mm

1.5 mm


easy weld CS – 120 mm

easy weld CS – 180 mm

easy weld rainwater outlets

easy weld pre-fabricated corners – external

easy weld pre-fabricated corners – internal

easy weld pre-fabricated rooflight corners

easy weld roof drains

easy weld sealing rings

flash weld

Hertalan flashing

Product Options

Product reference:

  • easy weld Basic is suitable for ballasted and adhered roofing systems, and is available in 1400 mm widths.
  • easy weld MF is intended for mechanically fixed roofing systems and is available in 1400 mm and 1700 mm widths.


Both grades are available in 1.3 mm and 1.5 mm thicknesses.


  • easy weld CS strips are available in widths of 120 and 180 mm. The underside of these strips is covered entirely in TPE.
  • easy weld rainwater outlets have the same dimensions as standard pre-fabricated outlets but are supplied with a TPE layer for hot air welding.
  • easy weld pre-fabricated internal, external and skylight corners, roof drains and sealing rings are also available with TPE layers.
  • flash weld is a non vulcanised EPDM with a special TPE layer on the underside, which enables it to be joined to an easy weld membrane using a hot air gun. flash weld can be moulded and will vulcanise slowly under atmospheric conditions. flash weld is used to form corners and angles, but should not be used for outlets or drain pipes.
  • Hertalan flashing is a non-vulcanised rubber that can be moulded into any shape or form by using heat. Hertalan flashing will vulcanise in open air with the effects of sunlight and heat. It is used at non-standard or unequal angles, at the edges of large round drains and to reinforce junctions at vents, drains and other details. Hertalan flashing is fixed to the easy weld membrane using ks 137 contact adhesive.

Third party certifications

  • Certificate: 91/2728/C : Hertalan EPDM roof waterproofing system
  • KOMO – UEAtc: Certificate: K4276

Similar products from Carlisle Construction Materials Limited